Report

FZJ-2016-05697

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png The Tensile Properties of Alloys 800H and 617 in the Range 20 to 950 °C

Abd E-Azim, M. E. ; Ennis, P. J.FZJ* ; Schuster, H.FZJ* ; Hammad, F. H. ; Nickel, H.FZJ*

1990
Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag Jülich

Please use a persistent id in citations: http://hdl.handle.net/2128/12566

Report No.: Juel-2344

Abstract: The tensile properties of Alloy 800H and Alloy 617 in the solution treated condition and after ageing or carburization have been determined for the temperature range 20 to 950 °C. It was found that ageing at 900 °C prior to testing led to an increase in strength and a decrease in ductility at test temperatures up to 700 °C. Above 700 °C, there was no ignificant difference between the tensile properties of solution treated and aged material. Carburization caused a severe loss of ductility in both alloys at temperatures of 20 to around 800 °C, but the ductility increased sharply at test temperatures above 800 °C, accompanied by a change in the fracture mode from fracture of the carbide particles themselves to void formation and separation at the carbide/matrix interface. The correlation between tensile properties and creep data was investigated in tests carried out at different strain rates. Reasonable agreement was found at 800 to 950 °C for Alloy 617 and at 800 to 900 °C for Alloy 800H. Strain ageing effects were observed in both alloys at some temperatures and strain rates ; these effects were serrated flow, negative strain rate sensitivity, peaks in the normalized UTS-temperature curves and plateaus in the elongationtemperature curves. The experimental results were interpreted in the light of two current models for strain ageing, the dislocation-dislocation interaction model and the dislocationsolute interaction model.

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Contributing Institute(s):

1. Publikationen vor 2000 (PRE-2000)

Research Program(s):

1. 899 - ohne Topic (POF3-899) (POF3-899)

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